The major obstacle to the use of xenotransplants is _____
a. the lack of human donors
b. finding nonhumans with similar-sized organs
c. resistance from opponents of genetically modified animals
d. organ rejection by recipients
e. the possibility of viral transfer from nonhuman primates to human patients
d
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The anatomical structure identified with the letter
“T” in the figure above is the a. myocardium. b. pulmonary veins. c. inferior vena cava. d. right atrium. e. heart apex.
You find some rather strange plants in your backyard. They consist only of thin, pale yellow stems that are wrapped around other species of plants growing nearby. You experiment by unwrapping some of the strange yellow plants and planting half of them alone in pots of soil and half in pots with other plants from your yard. You water and fertilize both sets of pots, but after a few weeks you find that the yellow plants that were potted alone have died, while those potted with other plants are thriving. What term would you use to describe the strange yellow plants?
A. holoparasitic B. asexual C. monophagous D. aposematic E. hemiparasitic
Because of the redundancy in the genetic code, many mutations in the coding regions of genes are:
A: somatic mutations. B: silent mutations. C: transitions. D: inversions. E: transversions.
In Arabidopsis plants, about 7% of its genome is devoted to processes tied to which molecule?
A. gibberellins B. rubisco C. ubiquitin D. auxin E. phytochrome